subgingival kit
As well as its needed effects, doxycycline (the active ingredient contained in Oraxyl) may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking doxycycline, check with your doctor immediately:

Incidence not known
Abdominal or stomach tenderness
bloating
clay-colored stools
cough
dark urine
decreased appetite
diarrhea
diarrhea, watery and severe, which may also be bloody
difficulty with swallowing
dizziness
fast heartbeat
feeling of discomfort
fever
headache
hives, itching, puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
hives or welts, itching, or rash
increased thirst
inflammation of the joints
joint or muscle pain
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
loss of appetite
nausea and vomiting
numbness or tingling of the face, hands, or feet
pain
redness and soreness of the eyes
redness of the skin
sore throat
sores in the mouth
stomach cramps
stomach pain or tenderness
swelling of the feet or lower legs
swollen lymph glands
tightness in the chest
unusual tiredness or weakness
unusual weight loss
yellow eyes or skin
Some doxycycline side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Incidence not known
Back, leg, or stomach pains
black, tarry stools
bleeding gums
blood in the urine or stools
blurred vision
bulging soft spot on the head of an infant
change in the ability to see colors, especially blue or yellow
chest pain, discomfort, or burning
chills
cracks in the skin
decrease in vision
difficulty breathing
discoloration of the thyroid glands
double vision
general body swelling
heartburn
increased sensitivity of the skin to sunlight
loss of heat from the body
lower back or side pain
nosebleeds
pain or burning in the throat
pain with swallowing
painful or difficult urination
pale skin
pinpoint red spots on the skin
rash with flat lesions or small raised lesions on the skin
red, swollen skin
redness or other discoloration of the skin
redness, swelling, or soreness of the tongue
scaly skin
severe nausea
severe stomach pain
severe sunburn
sores, ulcers, or white spots on the lips or tongue or inside the mouth
unusual bleeding or bruising
vomiting blood

Treating certain bacterial infections. It may be used in combination with other medicines to treat acne or certain amoeba infections. It may be used to prevent certain types of malaria in travelers who will be visiting malaria-infected areas for less than 4 months. It may also be used to prevent or slow the progression of anthrax after exposure.
Doryx delayed-release capsules are a tetracycline antibiotic. It works by slowing the growth of bacteria. Slowing the bacteria's growth allows the body's immune system to destroy the bacteria.